package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.Map;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private HttpServletRequest request;

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        /*
            进行md5加密，然后再进行比对
         */
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        /*
            对象属性拷贝（将employeeDTO对象属性拷贝到employee）
         */
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        /*
//            1.拿到当前请求中的jwt解析得到id
//         */
//        String jwt = request.getHeader("token");
//        Claims claims =JwtUtil.parseJWT("itcast",jwt);
//        Integer id = (Integer) claims.get("empId");
//
//        /*
//            2.利用 一个请求一个独立线程以及存储空间 原理 -- 可在拦截器解析jwt时setid，在这里getid
//         */
////        BaseContext.getCurrentId();
//        employee.setCreateUser(id.longValue());
//        employee.setUpdateUser(id.longValue());
        employeeMapper.insert(employee);
    }

    /*
        分页查询这块既能分页查询也能进行根据姓名查询-->细看Mybatis xml文件
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page =employeeMapper.page(employeePageQueryDTO);
        PageResult pageResult = new PageResult(page.getTotal(), page.getResult());
        return pageResult;
    }

    @Override
    public void startorstop(Integer status, Long id) {
        employeeMapper.startorstop(status,id);

    }

    @Override
    public Employee select(Integer id) {
        Employee employee=employeeMapper.select(id);
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        /*
            对象属性拷贝（将employeeDTO对象属性拷贝到employee）
         */
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
//        employee.setUpdateTime(LocalDateTime.now());
//        /*
//            1.拿到当前请求中的jwt解析得到id
//         */
//        String jwt = request.getHeader("token");
//        Claims claims =JwtUtil.parseJWT("itcast",jwt);
//        Integer id = (Integer) claims.get("empId");
//
//        /*
//            2.利用 一个请求一个独立线程以及存储空间 原理 -- 可在拦截器解析jwt时setid，在这里getid
//         */
////        BaseContext.getCurrentId();
//        employee.setUpdateUser(id.longValue());
        /*
            3.使用aop切面注解方式将需要的操作id和操作时间注入 也是利用的2
         */
        employeeMapper.update(employee);
    }

}
